Spring-damper for valve mechanism



E W. OHRT.

SPRING DAMPER FOR VALVE MECHANISM.

APPLICATION FILED JUNE 19, 1919.

1, 349,089 Patented Aug. 10, 1920.

Fig.

UNITED STATES PATENT OFFICE.

EMIL W. OHRT, OF REINBE K, IOWA.

SPRING-DAMPER FOR VALVE MECHANISM.

To all whom it ma concern Be it known t at I, EMIL W. OHRT, a citizen of the United States of America, and a resident of Reinbeck, Grundy county, Iowa, have invented certain new and useful Improvements in Spring-Dampers for Valve Mechanism, of which the following is a specification.

My invention relates to improvements in spring-dampers for valve-mechamsm, and the like, and the object of my improvement is to supply means for yieldingly and resiliently damping or preventing side-play in moving parts .of mechanisms, such as rocker-arms in engines by simple and efi'ective means applied removably thereto.

This object I have accomplished bv the. means which are hereinafter described and claimed, and which are illustrated in the accompanying drawings, in which F1 ure 1 is a front elevation of my improve resilient damping-means as applied to and bearing upon the rocker-arms of valve-actuating mechanism of a multi-cylinder block of an internal-combustion engine, and Fig. 2 is a slightly enlarged end elevationof a standard and rocker-arm with the resillent means applied to the latter, other parts bein removed or broken away.

gimilar numerals of'referencedenote corresponding parts throughout the several views.

The numeral 1 denotes the single block of a multi-cylinder internal-combustion engine, in whichare arranged six cylinders, but the particular number of cylinders is unimportant, as my invention is applicable in practice toone or more.

These cylinders are each supplied at one head with a fixed'bracket or standard 2, and the standards 2 have alined bearing-orifices.

The numeral 3 denotes a pair of rockerarms such as are usually employed as part of the valve-actuating mechanisms of such engines, and are mounted in contact with and to rock upon opposite sides. of each of said standards. The rocker-arms usually have flat circular bosses 6 contacting with like abutting bosses on the standards. The rocker-arms have operative connections or engagements respectively at.their opposite ends with the push-rods 4 and with the resiliently controlled valve-stems 5. The rocker-arms have medial transverse bearingorifices alined and registered with said bearing-orifices in the abutting standards 2.

Specification of Letters Patent.

Patented Aug. 10, 1920. 1919. Serial No. 505,265.

Cylindrical bearing-pins or pintles 14 are usually mounted loosel within the alined orifices of the standar s 2 and the rockerarms 3 to serve to support the latter to rock as actuated by said push-rods 4.

In order to prevent side-play of the rocker-arms and the noises incident thereto, I have supplied the following means for yieldingly and resiliently keeping them securely in contact With the abutting bosses of said standards.

The said means comprise cylindrical rods similar to the rods or pintles 14, associated with and alined with the latter, and helical compression-springs 12 mounted on the rods to bear yieldingly against the abutting outer. bosses 6 of said rocker-arms 3, as shown in Fig. 2.

he rods may be in difieren't lengths, as shown, in order to be properly proportioned to bridge the varying interspaces of the standards 2. Relatively short rods 10 may be used to bridge the narrow interspaces of pairs of standards, in which case the ends of the rods 10 are supported loosely within the outer parts of the orifices of the rockerarms.

To bridge the wider interspaces of other pairs of standards 2, longer rods 7 are used, and in this case, end-parts of the pintles 14 are allowed to project outwardly a short distance. Upon these end-parts and upon the interposed rods 7, sleeves 11 are mounted loosely in contact with the abutting bosses 6 of the adjacent rocker-arms. Springs 12 are located between and engage the opposed ends of said sleeves 11, whereby the latter, used as spacing-means, as the springs are preferably all of the same length, are kept engaged with the rocker-arms.

The outermost standards 2 have longer pintlerods 1'3 fixedly secured by screws 8, the outer parts of the pintles 13 projecting sufliciently outwardly to receive the springs 12, and split-pins 9 at the outer ends of the pintles engage the abutting ends of. the.

springs.

It will be seen that the assemblage of resilient devices shown are mounted and act efiiciently in preventing side-play of the der block havinga plilrality of alined spaced standards all orificed in alinement, certain adjacent standards being spaced farther apart than others, aplurality of pintles loosely mounted in the orifices of said standards and across the interspaces thereof, rocker arms transversely orificed and mounted to rock at opposite. sides of each standard on said pintles, helical compression springs mounted on said pintles between the narrowly-spaced standards and yieldingly engaging the adjacent rocker-arms, sleeves positioned partiall across the wider interspaces of said stan ards to support bridging ones of said pintles, and helical compression springs mounted on said bridging pintles and yieldingly engaging abutting ends of said sleeves to force the latter against the adjacent rocker-arms.

2. In combination with an engine cylinder 2 block having a transversely-orificed standard, a rocker-arm positioned in contact with said standard and transversely orificed in alinement therewith, a pintle loosely mounted in said alined orifices and projecting 2 therebeyond, and a helical compression spring mounted on the projecting part of said pintle, secured at one end, and bearing yieldingly against the abutting part of said rocker-arm to prevent side-pla thereof.

x Signed at Waterloo, Iowa, th1s 31st day of May, 1919.

EMIL W. OHRT. 

